Originally shared June 11th 2012 - We have been doing numbers and basic maths recently with them, using the normal flash cards and coins. They are still not visualising numbers all that well so I decided to try and design a basic set of counters that could form games and number play before bedtime.The main 100 grid is 150mm x 150mm so better to print in PLA than ABS, also try out the 'Brim' setting as proposed by Idolcrasher bit.ly/KfkAH0And if you add a layer of a different colour on the last solid print surface the numbers will be more prominent.More details on my Blog Here - www.richrap.blogspot.com