Yes, WIGGLERS is a Scrabble word!

Letter values in Scrabble US: W 4, I 1, G 2, G 2, L 1, E 1, R 1, S 1.

Is it a valid word?

WIGGLERS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

one who can't stay still (especially a child)
larva of a mosquito
terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers

Also: fishing worm, dew worm, red worm.

Not playable in Scrabble US: NIGHTCRAWLER.