Holga K202 Cat Camera - 35mm Camera That Meowwww!
You thought camera couldn't be fun; then try this one, the Holga K202 Cat Camera. This camera is made to attract and keep kids focus on looking at the camera with its meowwwww sound.
I know first hand taking pictures of kids can be really hard when they are not interested, but I'm not really sure sound effect like cat calls would be effective.
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If you do think it will work effectively in term of capturing kids attention, then you can buy one on Ebay for $29.99 (buy it now).
35mm camera makes strange cat noises [via technabob]