Create mod in Minecraft: build your first machine and contraption
2 Slimeballs, 1 Iron Sheet and 1 Iron Nugget.

A Slimeball is a sticky green ball dropped by slimes and by sneezing baby pandas.
It is made with the Crafting Table from Slime Block.
Slimes drop them when the smallest ones die, and a sneezing baby panda sometimes leaves one. Slimeballs craft sticky pistons, leads, slime blocks and magma cream, and they breed frogs.
Slime Block → 9 × Slimeball
// Slots with several items cycle through every accepted option.
2 Slimeballs, 1 Iron Sheet and 1 Iron Nugget.
One powder fuels 20 brewing operations, and powder is the ingredient for Potions of Strength and for Magma Cream (with a Slimeball).
At the Crafting Table: 1 × Slime Block gives 9 × Slimeball. It is dropped by Slime. Sold by Wandering Trader. Sneezes it: Panda.
It makes sticky pistons, leads and slime blocks. It is an ingredient in 3 recipes, made at the Crafting Table; for example Magma Cream, Slime Block and Sticky Piston. Animals that eat it: Frog and Sulfur Cube.