Most christening gifts for DS were toys (very nice ones BTW) and I think that eventhough they were not very symbolical they were a real help, DS loved them and ... so did we would not have spent so much money to buy toys that expensive.
We also got photo albums, some of them are very nice but I have not yet had time (or will) to sit for several hours to organise the photos. The handprint set sounds like a very good idea.