I was rammaging through our Montessori shelf when the boy asked to do his 100 board. I was alittle apprehensive since 1) it was not homeschool hour and 2) i wasn't sure if he was going to complete it.
However, N managed to stick to it (well at least until 80 some and after a gentle nudge from me to finish it). I was pleasantly surprised how interested he still was with this. He didn't do this in order but randomly picked a number and figured out which was the correct spot to place it.