Can you insert the dime into the large circular area? The 10 cent challenge is whether you can do it in 5 minutes. Very few people will accomplish this! Its alot harder than it may look...... This puzzle is related to our very popular 10 Penny puzzle, but it is more difficult. Based on circle packing mathematics where the area of each piece increases by an area equal to the #1 circle. Although we did slightly modify the #1,4, and 10 pieces to take up any rattle room. We believe there is only one solution which is provided with the puzzle. Size of puzzle is 4 x 4.4 x .5" Pieces are laser cut and etched for accuracy. Base is floorboard for stability and scratch resistance. Pieces are alder and maple, though these woods may vary. Made in our Hudson, FL shop. Copyright 2020 Creative Crafthouse design by Dave Janelle. Level of Difficulty: 2