1. This cool tool bench used to be a thrift store nightstand. thefrugalgranny.blogspot.com You can customize the paint color too. From The Frugal Granny. 2. A refrigerator box becomes a slide. thecontemplativecreative.blogspot.com Only if the kids decide not to make a fort out of it. From The Contemplative Creative. 3. Old sheets and some wood make a campground. lindsayandandrew.blogspot.com These tents fold up for easy-ish storage too. From Lindsay and Drew. 4. Hang a shower curtain on a Hula-Hoop for another type of tent. alannageorge.com You could make these indoors on a rainy day, if you find a way to hang them up. From The Craft Nest. 5. Use old paper towel rolls to make a marble slide. looledo.com As a kid, I loved the crafty potential of paper towel rolls! Find this on LooLeDo. 6. Three words: DIY Mario Levels. dosfamily.com There isn't a tutorial for this one, but you could let it be the jumping off point for your inspiration. Via Dos Family. 7. Collect recyclables into a water wall. playbasedlearning.com.au It may look like trash on a wall to YOU, but to the kids, it's a magical thing that makes the water go in different directions. This tutorial's from Irresistible Ideas for Play Based Learning. 8. Or make it for balls, not water. learningthroughtheclutter.blogspot.ca It's so fancy, but prettier than the plastic bottles. From Learning Through the Clutter. 9. Feeling carpenterish? Make a dollhouse. suttongrace.blogspot.com Sutton Grace has printable plans. 10. This simpler dollhouse is made from a CD shelf. sewshesews.wordpress.com Although the house-looking part came from Michaels, I'm sure you could make it work with another CD shelf. Originally on Sew She Sews. 11. Option 3: update a chest of drawers. turkeyfeathers.typepad.com Really, you can make a dollhouse out of many things. This one's from Turkey Feathers. 12. Puppet theaters are also really awesome. thecreativityexchange.com This one, from The Creativity Exchange, uses a cardboard box. 13. Bake fake food in an upcycled fake kitchen. giggleberrycreations.blogspot.com Directions at Giggle Berry Creations. 14. Here's another cool play kitchen. oh-write.blogspot.com From Oh Write. 15. Race marbles down pool noodles! spoonful.com Pool noodles are the best dollar-store find, ever. On Spoonful. 16. Tap into your artistic side with a giant chalkboard. apartmenttherapy.com Great for a backyard, so the chalk dust doesn't go everywhere! From Apartment Therapy. 17. More art: in the bathtub! chalkinmypocket.com This homemade puffy paint doesn't even stain the tile. By Chalk in My Pocket. 18. Because cardboard boxes are basically the best. allfortheboys.com Tape it together like they did over at All For the Boys, and it's collapsible. 19. After you paint your house, make a drumset. atelierrueverte.blogspot.com.es You just might want to buy ear plugs too. From Green Street Workshop. 20. This road rug has a zoo! howdoesshe.com Directions on How Does She? 21. Or try this other version, made with washi tape. playfullearning.net This one's from Playful Learning. 22. Use PVC pipe to make a bow and arrow. nothingbutcountry.com From an awesome Brave-themed party on Nothing But Country. 23. Send water or sand down these cool tubes. mserinsroom.blogspot.com It just takes some zip ties and funnels, according to Little Preschool on the Prairie. 24. Let your kids spy on the neighbors with a PVC periscope. instructables.com You might have a Harriet the Spy: Next Generation on your hands. Directions on Instructables. 25. Experiment with Sharpies and rubbing alcohol to make dancing ribbons. twigandtoadstool.blogspot.com A great way to get them off that PS3, maybe. Maybe. From Twig and Toadstool. 26. This magnetic fishing pole is a super clever idea. madebyjoel.com You'll have to find some old wooden spools. I'm not sure if they'd be worth the effort, but you can decide that for yourself. Directions on Made by Joel. 27. This seesaw purportedly costs less than $20. ana-white.com For advanced or daring DIYers only — the plans are on Ana White: Homemaker. 28. This DIY sandbox is prettier than a store-bought version. danamadeit.com While they're in the sandbox, you can relax on the back patio! You can find tips and plans on Made. Also of note: add cinnamon to your sandbox to keep the bugs out! Via Parent Hacks. 29. When it gets too hot outside, let the fairies come inside. mommyblessings.com Mommy Blessings put a lot of effort into her fairy house and got lucky enough to find a pretty tree trunk. But it's a beautiful inspiration! 30. These scooters will give you an excuse to refinish your wood floor. crumbbums.com Just make sure to confiscate them after the refinishing job's done. From Crumbbums. 31. Turn a plastic bin into a pirate ship! inspiredbyfamilymag.com Ahoy! You can also use a cardboard box, a laundry basket, or whatever else you have on hand — Inspired by Familia also uses it as toy storage. 32. Another upcycled piece of furniture: a dress-up headquarters. aturtleslifeforme.com Maybe this will inspire her to hang up her dress up clothes when she's done? From A Turtle's Life For Me. 33. Like Lincoln Logs, but life-sized. View this video on YouTube play-scapes.com Make the ultimate pull-apart playhouse. There are plans via Play Scapes for $13. 34. Use an old keyboard for a kid-friendly laptop. monzanitas.blogspot.com This way, they can "help" you write those emails without having to use your keyboard. From Monzanitas. 35. Fabric scraps make great blocks. zaaberry.blogspot.com Even better: they can throw them at their sibling, and no one gets hurt (physically). This would work with Stitch Witchery and an iron too. Directions on Zaaberry. 36. Get them jumping with some hopscotch. agirlandagluegun.com This one only requires hot glue, and it's reversible. Via A Girl and a Glue Gun. 38. Bring this in the car with you next time you take a road trip. thebooandtheboy.com There aren't direct instructions for this project from The Boo and the Boy, but I bet you can figure it out. Switches, knobs, and buttons are the best. 37. Inspire them to become a doctor with a felt playset. sewcando.com It either requires a needle and thread or some Stitch Witchery, but it's so cool. Especially the X-ray thing. From Sew Can Do. 39. Give them a cardboard box... Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Via catgifpage.com ...and just see what they do with it.