Family day's out for less

As parent's of a small, 2ft tall dictator who doesn't speak English very well (or any language other than what sounds like very broken dutch) we often find ourselves on days out. Being that Mr Grump only gets 1 day off on one week and then 3 days off the next, we like to make the most of his time off. So here are our very fun and very cheap ideas to get out of the house. Bare in mind we are very fortunate to live right on the sea front and a half an hour drive from Dartmoor...

• Plymouth National Marine Aquarium is one of our favourites. Get a Day Plus pass, this means you pay for one days entry and you get an entire year free of charge. We often go there to just sit and have a picnic in front of the big tank or the sharks on a rainy day. 
• Jump. Our toddlers paradise. We have loyalty cards up to our elbows and that means when you pay an entry you get one stamp. 4 stamps equal a free adult drink, 5 stamps equal a free meal and 6 stamps equal a free admission and you can redeem all of these at once. Entry for a 1 year old is £3.75 and adults go free.
• Swimming. We are fortunate enough to live by a tidal pool which is completely free. In the hot summer it is a refreshing change from the chlorine environment most are used to. We also live near another open air pool which is free. If it's cold we go to our local swimming pool. Because Mr Grump has Military discount, its £4 for a family of 3 to swim! 
• Dog Walks. We frequent local dog walking areas as our toddler loves to feed the dogs treats (with owners permission) and for him, that's like paradise.
• Plymouth Museum is free and on a Saturday morning they have cinema showings for free. Check your local What's on guide for local attractions and events.
• Duck Pond. We have a local duck pond where we take Mini Saver. He loves feeding the ducks and its also surrounded by a gorgeous green area where he can run safely.
• Local Children's Groups. Our Church holds a parent and child messy play on a Wednesday morning for just a pound. Check your local area.
• Play parks. We have known to have traveled miles to attend new and exciting play parks but luckily on our doorstep we have one at the bottom of the road.
• Boat Trips. We are extremely lucky to live on a water taxi route and also a ferry route, if we are at a loss of what to do its always a huge treat for Mini Saver, he loves it!
• Feeding the Horses. Because we aren't far from the moors we are able to get a bag of cheap carrots from Tesco (89p 1.5kg) and off we go to feed the horses.
• there are so many other ways you can cheaply occupy yours and your family's outdoor time. Check the whats on guides for your areas.

Any ideas to add? Let me know!