My daughter had a lot of fun at the event. She loved getting to put stickers on her creation. She insisted on waiting in line for the creation challenge. I did feel that they could have been setup for higher capacity. They had 6 slots for the Family Creation challenge & 5 for the make it/take it. We arrived a little before noon & shopped for a while. A couple of minutes before noon we saw a line had formed, so we got in line. We were able to be the first group to do the free form creation, but then had to wait in line for the creation challenge.
The Lego Games do look interesting, but are mostly geared for older children. Most had a minimum age of 7 or 8. I have told my daughter that I will make our own version of this game by giving her pictures of things to build (a boat, a bench, a snake, etc). Considering that we already have a fair number of plain pieces, this is a much more economical way to make a game.
Of course, we did not walk out of Toys R Us empty-handed. They had a bin of sale Lego items. We found a Castle Building Set