Here's a simple puzzle game you can make without paying a single cent. Oh well perhaps just the printing & paper cost. Select any pictures you like, here i used my animal flash cards. I photocopied the pictures and pasted them over cardstock. Initially, i cut each picture into half and got N to fit it together.
Now that he is older, i cut them again to make it into a 4 piece puzzle. I mixed all the pieces and got N had to sort out the pieces, identify the animals and fit them together. It was real educational fun!