bought for 10 year old. He loved putting it together and was about 6 -7 hours of challenge and fun. Running the marbles once assembled is limited however. The light wood pieces break and lose their connections fairly quickly. We started using glue to keep some pieces together, but just not really built to last. Maybe next gen. will be better.Looks great on a shelf.
ROBOTIME 3D Wooden Puzzle Mechanical Gear Clock Owl Model Kit For Teens & Adults - DIY Building Set
36 Review
6-Pack Speed Cube Set: 2X2 3X3 4X4 Pyramid Skewb Ivy Stickerless Puzzle Cubes - Perfect Christmas/Birthday Gift For Kids, Teens & Adults!
32 Review
Robotime 3D Wooden Craft Kit: Brain Teaser Games Mechanical Gears Set With Cog Coaster And Steel Balls - Best Building Toys For Kids
47 Review
Engage Your Child'S Curiosity With The 5 In 1 STEM Kit - The Perfect Educational Building Toy For 8-12 Year Old Boys And Girls
36 Review
Colorful Venice 1000 Piece Jigsaw Puzzle By Colorcraft
20 Review
100-Piece Under The Sea Glow-In-The-Dark Puzzle For Kids Age 5+ - Colorful Illustrations Of Underwater Fish, Plants, And Sea Creatures - Award-Winning And Perfect For Learning And Play
12 Review
1000 Piece Mandala Jigsaw Puzzle - Creative Colorful Black Fantasy Bgraamiens Color Challenge Puzzle
17 Review
Mudpuppy Magical Friends 4-In-A-Box Puzzles, Ages 2-5, Each Measures 6βX8 - Chunky Puzzles With 4, 6, 9 And 12 Pieces - Difficulty Level Grows With Child β Beautifully Illustrated Puzzles, Multicolor
16 Review