We purchased the medium pack and it has been a big hit. It's just the right amount to supplement other block sets and builds.
These blocks are incredible- well-made, beautiful, and your kid will use these non-stop every day. We build garages, cities, villages, car parking lots, airports, towers, etc. The flat pieces are perfect for roads. My only regret was not buying a bigger set. I bought the medium one for my 3 year old--will have to buy another one. EXCELLENT gift. I'm buying the small set for my brother-in-law as a baby gift.
my 7 year old uses these all the time, we especially love them coupled with his grimms blocks. I'm sure my infant will be playing with them in no time. we were originally going to buy the smaller set but it was out of stock, definitely glad we got this one, maybe should have gone bigger.