I also made the topper to go on top which was most satisfying until my lovely son scattered all my beads everywhere:
Other than the cake I have also been crocheting, I have a big problem with sizing though as the hat I was making to fit the new baby fits on G's head and the booties seem too small. I've done a little bit more on my granny stripe blanket from http://attic24.typepad.com/weblog/granny-stripe.html :
and I have sewn a pram liner for the buggy to add a bit of colour and comfort for the new baby as we will be switching from pram to pushchair mode a fair bit once baby 2 is here: