My son has that same Fisher Price toy to lay under and play with and he loves it! Did you know it can be a tunnel when he starts to crawl? Anyway, I saw your question on MckMama's blog frog about baby food and I wanted to answer for you if I may...she uses Super Baby Foods by Ruth Yaron. I've been using it with my second and it is fantastic! Hope this helps!
Thanks Jenney! I picked up that book recently and started him on one of the suggested beginner superfoods - mashed bananas. It seems to be going well so far.