(Im not asking for a script im simply asking how would I approach this/format) So, how would i make a tool that would run this code:
game.Players.LocalPlayer.leaderstats.Weight.Value = game.Players.LocalPlayer.leaderstats.Weight.Value + 10
and this code on drop:
game.Players.LocalPlayer.leaderstats.Weight.Value = game.Players.LocalPlayer.leaderstats.Weight.Value - 10
Whenever you want to perform any sort of Mathematical Arithmetic on a Number you need to always set it equal to itself and then the Arithmetic. What you are trying to achieve is very easy. I recommend to first read this discussion about it . I would personally go with storing all the tools they have in a Table. Anyway's that's pretty much all the information you need really. Here are a few links you could use.
PeasFactory's Scripting Tutorials ( Really useful, Learnt a lot from him)