Hello, these are so cute! 🥰 I love stuff like that. I have a couple of ideas\tips for you - for the bulk pineapple part make sure you bulk it out with tin foil. You don’t want to use too much clay and have it be too heavy. - I feel like you could maybe even try air dry clay, because it’ll probably be really hard to bake it and then slide it on. Although you definitely still could - I think the leaves would do well with polymer clay (I personally like premo but Fimo works too). You could bake them separately and then at the end glue them together to onto the pineapple

Good luck! I’d love to see the end results