Trip wires everywhere. Starite is attached to a trip wire preventing the starite from blowing into the spikes; however, trip either red or purple wires will release the starite.

To get to the starite, place an immovable object between the spikes and the starite. Equip Maxwell with a flying device. Trip either red or purple wire. Get the starite!

Round 1:
Immovable steel box
Talaria

Round 2:
Immovable invincible case
Wings

Round 3:
Immovable invincible
Flying Shoes

Scribblenauts Remix 15-2 Cheats Hints gallery:
15-2-1-a: Beware! Both lower trip wires destroy the rope attached to the starite!
15-2-1-b: Flying is required to solve this puzzle.
15-2-1-c: Use an object to prevent the starite from blowing into the spikes.