my minded children was playin with these at a sure start they are like a bit bigger than a credit card you press the button to record voice then press to listen they loved it a very reasonable price too :D
http://www.tts-group.co.uk/Product.aspx?cref=TTSPR1407468&rid=64&cid=7

i use something similar on my displays - for example on my diwali one when you pressed it i had put a piece of indian music , and they would be great for animal noises etc. mine are more like buttons , but these are good as you can put bigger pictures on them as well. are they card or plastic? wondering how resilient they would be.

I love tts! I've applied for resources using my capital grant funding all from TTS. They're stuff is amazing!