Fort Lauderdale during Spring Break? That's a great idea...not.
Curacao is Bonaire diving with easier sandy beach entries vs. over the ironshore/coral rubble that you'll find at most Bonaire sites other than the resorts. Same low-current diving - most of the week we were there it was flat calm. 3rd week of April. More to do on the surface also. Some of the signature Curacao dives are shallow also - the Tugboat is 15' deep, we found seahorses at 40' at Varsenbaai and turtles feeding in 6' off the beach. We rarely broke 60' all week and the reef starts to go deep around 40' so just stay on top.
Another option might be Grand Cayman. While most 1st dives there are deep down the wall, many operators offer shallower options - esp. in the afternoons. Since many of the boats limit divers to 6-8 max. as 3 you have a higher chance of being on one. They do 2 tank afternoon dives also. Some pair it with Stingray City - the most fun you can have diving in 15' of water. For your husband, the North Wall dives start at 60' or so, typically dives are around 100' with a 6000' drop-off. Some of the best in that area are Babylon, Ghost Mountain, Hammerhead Hill - near NW Point deep sites are: Big Tunnel, Orange Canyon, Trinity Caves etc.
The best shore dive IMO - Turtle Reef - bottoms out at 50' to the south - 70' to the north. The famous school of Tarpon is shallower and Turtles up to the surface. Lots of things live on the wall from about 15' down. Lighthouse Point or Cobalt Coast are also really shallow shore dives leading out to the wall. (long swim)
In Georgetown Eden Rock hardly exceeds 40' - it becomes sandy past that so nothing to see anyway. It's a better dive when the cruise ships are gone. A lot of it within 15' of the surface. The Devils Grotto next door has swim-thrus in less than 40' - most open on both ends with light above many of them. It also doesn't exceed about 40-50' There's a couple dead ends so ask at Eden Rock - I believe they had a map on the counter. Sunset House nearby is another shallower dive. The reef off the Salt Water Pool starts about 10'. The Mermaid is 55' at the base. At certain times the Atlantis Sub cruises by - your daughter might like seeing it.
And she can dive the top levels of the Kittiwake (non-penetrating) - there will be a DM assigned to each group going to a different level - it's a CITA requirement. If you husband is AOW he can dive the bottom in a separate group. For boat dives, the Aquarium dive site is all about 40' deep. Look for fish hovering over the coral heads, those are banded coral shrimp cleaning stations. If she slowly holds out her hand, they'll climb on and trim her cuticles. Pricey to stay/dive on Cayman though. Boat dives are 2/$100 and food is expensive.
Another option is the Virgin Islands. St. Thomas probably will have a lot of spring breakers downtown but on the East side - most dives are very shallow. We dove off Grass Cay and never broke 40' - most 30' or less. Several dives in that area. Coki Beach is a shore dive - no deeper than 40' off the beach until you head towards Coral World. A lot so shallow that SNUBA is popular there.
Across to St. John by car ferry (1/2 hr.), there's shallow dives off Trunk Bay and other shore accessible locations. Any dive operators in that area dive between the islands and cays nearby. We liked Dive In at Sapphire Beach resort - smaller boat, they'll go with 4 and provide a DM. Cow and Calf Rocks is a signature dive - no part of it is deeper than 40' IIRC.
Or transfer over to the BVI's via fast ferry - 1-2 hrs. max. We did about 25 dives in a week there - all boat diving. Many were 40'. The only dive a little deep is the Rhone, both halves are in the 50-70' range. The back is totally open to the surface with some interesting things to see. Some like Thumb Rock or the Dog Pinnacles almost break the surface. Seal Dog Rock does. I filmed big schools of silversides there in 20'. There must be 15-20 dives that never exceed 50' - many are good at 20'. Your husband might not find as big a challenge - the Chikuzen is a great wreck if conditions permit getting out there. And there's the front of the Rhone - a long swim-thru. The Deep was filmed there. DiveBVI lists depths on their dive sites pages:
Dive Sites | Dive BVI
Excellent snorkeling also. At Mango Bay, the reef is so shallow boats can't get in there. And the Baths is a world famous snorkel/beach area.
Excellent restaurants also. If you go, the Leverick Bay Beach BBQ on Friday is worth the drive. Rock Cafe is one of the better restaurants. Not the cheapest place to stay but very low-key. Our villa didn't even have a front door lock. There's only about 3000 people on the whole island.