Parents·Posted on Dec 18, 201435 Holiday Gifts That Will Secretly Challenge Kids' MindsToys and games to make them think and learn stuff.by Morgan ShanahanBuzzFeed StaffLinkFacebookPinterestTwitterMail 1. Big Ball of Whacks 2. Plywood Playing Cards 3. Tummple 4. Fidget Widget 5. DaVinci's Catapult 6. Inside3 7. Kyro 5 8. Staxis 9. DIY Board Games 10. Stormy Seas 11. Free Play Magnatab 12. Touchy Feely 13. Suspend 14. Iota 15. Squigz 16. Colorfall 17. Magformers 18. Tegu Blocks 19. Puzzlebox Modern Art 20. Perplexus 21. The Geek Box 22. Spirograph (The Original) 23. The complete children should know series. 24. Shell Game 25. Amaze 26. The Book of Impossible Objects 27. Gravity Maze 28. Marbleworks 29. On The Dot 30. X-Cube 31. Mental Blox 32. Whoa-Bots Ninjas 33. Kanoodle Genius 34. Osmo 35. smArt Puzzles