1. Number Bond Models
Make a models which represent the addition of different numbers, see below:
Presently the limitation is in the block sizes; LEGO has 1,2,3,4,6,8,10,12,16. We really could do with the following bricks 5×2, 5×1 and 7×1. Perhaps we can persuade LEGO of the advantage of this molding.
makingpi 