THE SIMS 4 ISLAND PARADISE

I'd love a castaway paradise expansion. A world where your sims have to make everything, with waterfall lagoons with underwater caves that sims can find a rare crystal in, take sample from it, mix with water to make a potion, drink and become a mermaid. If there were mermaids I'd buy that dlc even for 60 dollars. But I'd like no scales on land. Customiseable tails. And child and toddler tails! ( if they come ) and toddlers to play on the shore ando paddle in their mermaid form, and parents to teach them to keep the secret and a necklace with a piece of the crystal that made them a mermaid, as a symbol.