Here are some ideas: The Turner Art Gallery in Margate (https://turnercontemporary.org/) combined with shopping at Westwood Cross. The Beaney and Canterbury Roman Museum, plus Canterbury Cathedral. Howletts or Port Lympne zoos. Hythe High Street, sea front, and ossuary at St Leonards Church (https://www.slhk.org/welcome.htm), plus a walk at Brockhill Country Park in nearby Saltwood. A walk along the Leas at Folkestone and Folkestone Museum (https//folkestonemuseum.co.uk), the Old High Street Creative Quarter. Tenterden market (Friday mornings) and lovely shops and cafes, plus a ride on the Kent & East Sussex Railway. Derek Jarman’s cottage at Dungeness and fish and chips at the famous Pilot Inn. Rye (market Thursday mornings), quaint shops and cafes, plus you can climb the famous tower at St Marys Church – great views.
Hope this helps. x