DIY Children's grocery store - would be cute for a reading corner or play kitchen. reminds me of how my granny greer and I set up our play store.
Fun DIY Market out of PVC pipe. Also on this link is a really cute puppet theater, again, made from PVC pipe. Imaginative play for your little ones.
things to do with an ikea table - paint with chalkboard paint, cut hole, insert chalk bin, have fun - future playroom idea