Project! From The Diaphram!

Charlie Brown defined it as a "warm puppy", The Beatles as a "warm gun", but for my two youngsters, nothing defines "happiness" like a hearty mid-bottle burp. Each responds to a different technique: Carter requires little prodding beyond the odd back pat, while Nathaniel's a bit more difficult, preferring a head or tummy rub and lots of patience...

Years from now, they're gonna want to kill me for posting these photos...