Hello from Jersey! Yay THANK YOU for choosing our Island for your holiday, we are so badly in need of visitors this summer 🙂
A few suggestions below, apologies if I'm repeating previous answers;
Jersey Zoo is a must-do. It's all open again now and running as normal with the exception of just a couple of the smallest indoor enclosures. Keeper talks are back on and they're brilliant.
For a boat trip you could either go high adrenaline with a Jersey Seafaris RIB trip out to the offshore reefs or north coast caves, or a slow scenic south coast tour with Jersey Bus & Boat Tours. Or both!! They are both currently offering socially distanced sections to book for families. Both companies offer dishy crew for your visual pleasure 😉
If you haven't been before an Island Tour is a good way to get an overview, I recommend Jersey Bus Tours (they might have a tour & boat combo deal?) otherwise Tantivy Blue Coach.
Gorey & Elizabeth Castle are both open and well worth visiting, and La Hogue Bie is fascinating, it's one of the oldest man made structures on earth (older than the pyramids!).
You won't be able to miss the bright neon yellow electric bikes that are everywhere, you just need to download the Evie app to hire them (bring your own helmets) and they can be picked up and dropped off practically anywhere.
You can hire jet ski in St Aubins bay from Geoff's Sea Sport Centre, and kayaks/paddle boards in St Brelades Bay (where yet more dishy individuals in budgie smugglers will rent you a lounger and a parasol).
Surf lessons are at St Ouens Bay and there's loads of cool places for lunch or dinner down there too. The Watersplash and El Tico are favourites.
The War Tunnels are fascinating and currently open Thursday-Sunday, masks are required as it's all indoors.
If you're able to get space on a Seymour Tower or Bioluminescent walk with Jersey Walk Adventures then you absolutely won't regret it. The latter is one of the best experiences I've had anywhere in the world.
Our lockdown has been a bit looser and shorter than that in the UK and you'll find it almost back to 'normal' here although we are still officially distancing by 1metre where possible. Some restaurants are accepting pre-booking only while others will take walk-ins.
Covid test results are promised back within 48 hours but I believe the current average is 25 hours, and some have been back in 14. Visitors are asked to isolate as much as possible until they have their result, some businesses (ie: Seafaris) need a negative result before admitting you, but the beaches, cliff paths, bikes etc are all yours to enjoy safely. If you are booking anything like a boat trip or planning on a castle or war tunnels I'd go for closer to the end of your stay, to be on the safe side.
Please let me know if you have any specific questions and I'd love to know how you find it! x