Here are some of the best to try...
Thursday August 1
Children can have a go at being an archaeologist at Lewes Castle, where they will do some digging, handle real artifacts, produce a drawing and make their own treasure!
Two sessions: 10.30-noon and 2pm-3.30pm; £5 per child; all children must be accompanied by an adult; booking essential, call 01273 486290. Lewes Castle, Barbican House Museum, 169 High Street, Lewes, BN7 1YE.
Monday August 5
Lewes Castle is also running a Morning Explorer session, which is carefully designed for families with additional needs. Open between 10am and 11am, the session is for those who would prefer to visit when there are no crowds or who may require extra assistance to climb the castle or to access the museum's collections. Ring 01273 405734 if you want to discuss your needs in advance with the education team.
Regular admissions apply, but all activities are free and everyone's welcome to stay on when the castle opens to the public at 11am.
Wednesday August 7
There'll be treasure hunts, face painting and plenty of children's crafts at Michelham Priory's Pirate and Princess Day. To top it off, Crazee Hazee will be there with his pirate show. Dress up if you dare!
From 10.30-5pm, phone 01323 844224 to book. Michelham Priory, Upper Dicker, Hailsham, BN27 3QS.
Friday August 9
Lewes Castle is holding its supremely popular Dragons and Dinosaurs day, where young children can have creative fun with clay and handle real dinosaur bones at the same time! They'll take home the clay dinosaur footprints or scary dragons they make, which they will have used to help tell a dragon story.
Two sessions: 10.30-noon and 2pm-3.30; £5 per child; all children must be accompanied by an adult; booking essential, call 01273 486290.
Friday August 9, 10am - Sunday 11, 6pm
It's Firle Fair, one of the most family-friendly events of the summer! Funfair rides, a miniature train, music, Punch and Judy shows, Charlston and Lindyhop demonstrations, face-painting and comedy shows are just some of the features that will keep children entertained. Arrive in style on a vintage bus from Lewes bus station (pre-booking essential) and if you're there at 3.30 on Saturday 10th, you can hear iconic children's author Jacqueline Wilson talking about her latest book. Dress in vintage clothing to join in properly!
Firle Park, Near Lewes, BN8 6LP.
Wednesday August 14
Michelham Priory is going on a bug hunt! On its Wildlife Wednesday, children will be pond dipping, going on nature trails, bird watching and hunting for creepy crawlies. There will also be wildlife-themed activities, and Reptylers will be there with a selection of creatures to watch and hold.
August 15-18 and 22-25
The Green Show is a nature and environment-themed exhibition with all sorts of free workshops for children, for example, screen-printing, making recycled T-shirt bags and adding to the community's installation – a bloom of jellyfish made entirely from waste plastic!
South Hill Barn, Seaford Head, BN25 4JQ. For details, see www.wearescip.co.uk. It's free but all tickets must be booked in advance.
Saturday August 17 and Sunday 18
Illustrators Jack Snelling and Lizzie Lomax take families through some green-themed arts and crafts in their Seed Magazeen Workshop. In a one-hour session, you will get to make your own moving caterpillar, make bird feeders from milk cartons and discover how being sustainable can be fun too!
For ages 5-8; Saturday 10.30-11.30, noon-1pm, 1.30-2.30, 3pm-4pm; Sunday 11am-noon, 12.30-1.30pm. It's free, but must be booked in advance, see https://seedmagazeen.com Newhaven Community Garden, Pevensey, Newhaven, BN9 9TU.
Saturday August 31
The Amazing Art Cart's free, drop-in, flag-making workshop.
See theamazingartcart.com; all ages welcome; 11am-3pm. Lewes Depot, Pinwell Rd, Lewes, BN7 2JS .
Every Thursday in August
Fishbourne Roan Palace offers the chance to travel back in time to experience Roman life 2,000 years ago. Lots of craft activities accompany the dressing up and fun, all included in the admission charge.
From 11am-5pm; all children must be accompanied by an adult. Fishbourne Roan Palace, Roman Way, Fishbourne, West Sussex, PO19 3QR. Phone 01243 785859 for more details.