My DD is almost 18 months and absolutely loves the wooden peg jigsaws. We have 8 different ones, and she can do them all. Both her grandparents have several more and she can do all these too. In the interest of my own sanity (she doesn't like to do much else at moment if we are in) I wonder what the next step is puzzle wise? She's too young for proper jigsaws - is there an inbetween type puzzle that would challenge her a bit without being too frustrating? We have a few shape sorter type toys which she can also do quite quickly.