Oot 3d Hammer as child link
My first video of this game. Sorry for no sound and bad quality.
So hammer as child is only possible since ground jump as been found by nathanisbored and gabyelnuevo.
Small list of tricks used:
ocarina item with bottle (1:22) • OoT3D: OI with Bottle (no bombs!) (easier than the one with bombs)
ground jump (3:24) • ZeldaOoT3D: Forest Maze Skip
(I prefer doing the ground jump while in death hole mode because there's no timer so you have all your time)
Nayru's love bombchu megaflip (13:30) I don't know if there's another way to go to this platform but this one is a bit tricky. You need as much space as you can so that's why I go right in the corner but you can't get to much angle otherwise you won't be aiming the platform.
So combining this with RBA (with lens of truth) you could use the hammer everywhere in the fire temple (but don't exit it or die or use farore's wind) so you can get the gold skultula in the room behind the pillars of the first room.
And if you combine this with inventory overstuffing ( • Ocarina of Time 3D Glitch: Equip and RBA ... ) you can use the hammer to beat volvagia ! This mean max% child will no longer have to use NG+ :)