I was thinking about stuff like kit iron golem starts out with the normal one, and if you upgrade it, it will have protection 1 or something like that. Kit bomber starts out with 3 TNT, and as you upgrade it, you will get more TNT if you choose it. kit chicken starts with just 16 eggs, upgrade it and it will be 32. archer will start at 5 arrows, upgraded it will be 10, upgrade it another time and the bow will get power 1 or something. enchanter gets you started with 10 lapiz and 32 bottles of XP, upgrade it and you'll get 20 lapiz and 64 bottles of XP. just a few examples of some kits