My almost 3 year old already has a thomas and arthur train set, but I got this expansion set for the ease of combining the two sets and adding a bridge too. The only downside (if you can call it one) is that you cannot build a track to go underneath the bridge without manually "lifting" the bridge with more track pieces. This is not a problem as we never use all the pieces available. My little boy (and me) builds a new track almost every day as the possibilities are endless. Truely a great addition to any trackmaster set.
My son already plays with his train track a lot, so this was great addition to create longer tracks and have different set ups. He likes to change the points so the trains go different ways, all in all a good buy.
Bought this to go with Thomas as just a plain oval would become a little boring, grandaughter loves it and 'navvying skills' of both dad and grandad are pressed into service to create new layouts. An excellent, almost essential addition to any Thomas train.
Bought for my five year old son to double the size of his current set. Makes him think and plan out different track layouts which he does on a regular basis, usually at least twice a day. He is well pleased.