When my kids were younger, I liked giving them toys that would make them think. They seemed to enjoy it too especially the Lego and jigsaw puzzles. In one of their birthdays, I think it was Joey's and if my memory serves me right, he turned 6 at that time, one of my friends gifted him with a set of wooden puzzles. He and his sister liked it so much that they asked me to buy more. Actually they were fun to play with because even us, adults, liked solving them. These puzzles are great for making them sharper so if you're looking for gift ideas for kids, I would encourage you to give them wooden puzzles.