I feel like I've said this at every stage (except 18 months) but I must say, I think 21 months is my favorite! Kate is SO much fun right now. She can understand just about everything I tell her, and her vocabulary is growing by leaps and bounds as well, so she is able to communicate quite a bit with me. My favorite thing has been the beginning of pretend play. We first saw it with her buddies or her kitty Meow Meow. She teaches Meow Meow how to do things like climb stairs, jump off edges, and then praises him when he has done a good job. :) The most fun to watch her play is in the bath. She has 4 bath toys that are her favorite. She usually portrays herself as the dolphin, me as the turtle, and Jeff as the pelican. I think the crab is anonymous. :) She takes these toys through different courses of events. She makes "me" (the turtle) carry the dolphin around, saying "Are you ready?" "Ready." "Here we go!" And then they travel around the bath tub. Every once in a while the dolphin falls, and Kate says, "Are you ok? Ok?"
Sometimes she will put Jeff and me (the turtle and pelican) up on a shelf. Then she (dolphin) will kiss us both, then say "bye bye!" and swim off for a while. The sweetest was when she brought the dolphin up to the turtle, made them kiss, then said, "Awww, Mommy, I wat choo." (I wat choo is how she says I love you.)
Today I took Kate to a park here in town. So during her bath I watched her re-create all the fun activities she did at the park, there in the bath tub with her dolphin. Slides, climbing the sides, running across bridges, etc. Anyway, all that to say just how much fun she is, and how amazing it is to see the world through her eyes, and her interpretation of the things going on around her!