The main features added are:

Butterfly Nets

Can be crafted using 3 sticks and 4 strings. Right click/Hold the screen while standing on a flower to test your luck and catch a butterfly! You will not find butterflies on grass, fern, and double tall flowers. There are currently only 6 butterflies to catch. See if you can catch the rare ones!

You can either keep the butterflies as a trophy catch or you can release them by right clicking/holding the screen in exchange for a certain amount of experience depending on the butterfly's rarity.

Known Bug:

• Yellow grass and Monarch butterflies can't be released. Will fix as soon as possible.
• Butterflies give out too much xp for it being so common. Will fix as soon as possible.

Climbing Hooks

Can be crafted using 2 sticks and 2 flint/iron. Right click/Hold the screen while standing near a fence, a wall, or iron bars and it will make you climb it! I have no knowledge on how to make it run smoothly. Sorry about that! Just imagine that climbing in minecraft is really difficult and requires skill to master. Climbing hooks will not work on blocks, a single block wall, and glass panes.

Crayons

Can be crafted using 2 honeycombs, 1 paper, and 1 dye of either of the 8 colors presented above. Right click/Hold the screen while sneaking and color will appear beneath the player's feet as if they are drawing on the floor. The drawing the player makes will only last for 10 minutes, can be removed using a water bucket, or can despawn when you leave your single player world.

Notes about crayons:
This feature is prone to lag especially if it is used on a server. I will make a server friendly version of the addon where the drawings can only last up to 1 minute to avoid potential lag raids in servers.

It is made to be only 8 colors for it to be convenient for the player to avoid taking up most of the player's inventory. New colors (even white and black) will most likely not be added.

Magnets

Can be crafted using 5 iron ingots, 2 lodestone minerals, and special additions to make specific magnets. Lodestones can be found under y50. Right click/Hold the screen to retrieve items from a certain distance. To make the game balanced. Certain magnets have their magnetic capability reduced.

Note about magnets:
Mob loot magnets are only limited to items. It doesn't attract weapons and totems to avoid being unbalanced during pvp. The same goes for the mineral magnet. It doesn't attract weapons.

Known bugs:

• Lodestone cannot be found naturally at the moment. This will be fixed as soon as possible.

Animal Whistles

Can be crafted using 2 iron ingots, 1 iron nugget, an 1 food of the tamable animal you wish to "follow" you. Right click/Hold the screen to make 5 mobs in a 20 block radius to teleport to you. This can be used to find pets you have lost and make pet-finding easier.

Here are the tamable animals they attract:

• Dog whistles attract wolves
• Cat whistles attract cats and ocelots
• Bird whistles attract parrots
• Horse whistles attract horses, donkeys, mules, and llamas
• Fox whistles attract foxes

Note about animal whistles:
This whistle is specially made for tamable mobs. I will not be making whistles for farm animals or villagers because it is difficult to get a big number of mobs to follow you without making it overpowered.

About Copyright

I give no one permission to use my custom item textures and particles. You can play around with your own concepts of butterfly nets, climbing hooks, crayons, magnets, and pet whistles, but I do not permit you to build on this addon. 

Showcasing my addon? Tag me! 

I would love to see it! It's also a way for me to track bugs and fix them. My YouTube channel name is ArtLaBlanc.

Do's:

• Credit me in the description 
• Put the addon link in the description

Don'ts:

• Claim it as your own

Screenshots: