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Spitalfields City Farm has always been a great place to take your kids, but did you know that you can get involved as well? Without volunteers the farm wouldn't even exist, so they're always keen to welcome new people who don't mind mucking in.
Their chief attraction is the farmyard animals. They've got chickens, ducks, geese, sheep and rabbits, plus a few pigs and a donkey. You'll be expected to take part in their daily care, but don't expect to just sit on the side and watch. This event is all about you rolling up your sleeves and getting stuck in -- so prepare to get messy!
If you'd prefer something a bit more pleasant and gentle, then how about volunteering in their gardens instead?
Bear in mind that it's not quite as simple as just turning up. You must be over-18 to volunteer and fill in an application form, followed by an interview. If you can't be bothered with all of that then you might have better luck at one of their gardening sessions -- but they only operate on Wednesdays.
If you're a big animal fan then you might also be interested in a couple of special events at London Zoo. If you don't mind stumping up a small fortune in fees then you can go inside some of the animal enclosures and be a Zookeeper for a Day. They also offer a slightly cheaper option called Meet the Animals, where you can get close to the penguins, giraffes, meerkats and monkeys.
If you've got little kids then you might prefer to visit Battersea Park Children's Zoo instead. They don't have anything as big as the animals London Zoo, but they've got some monkeys, exotic birds and farmyard animals.