This product would be the best fit at costume stores and online marketplaces selling temporary hair dye markers.
Hair Chalk Comb, 6 Colors Temporary Hair Dye Gifts for Adults - Non-Toxic Washable Hair Chalk for Women,Temporary Bright Hair Color Cream for Festival, Party, Christmas, Halloween, Birthday
Byhoo Hair dye for Dark Hair, Temporary Hair Colour Comb for GIrl & Women. Great Gift on Birthday Halloween Christmas Cosplay Party, Easy Washable and Safety Hair Chalk Comb(6 Bright Colour)
Qivange Hair Chalk Comb, 6 Pcs Temporary Non-Toxic Hair Coloring for Kids, Ideal Cosplay, Halloween, Carnival, Birthday Party Gifts for Girls Boys
10 Pcs Hair Chalk for Kids Girls Gifts, MSDADA Temporary Bright Hair Chalk Comb for Kids Girls Age 6 7 8 9 10-12+Washable Coloured Hairspray for Birthday Children's Day Halloween Christmas Party(Pink)
10 Pcs Hair Chalk for Kids Girls Gifts, MSDADA Temporary Bright Hair Chalk Comb for Kids Girls Age 6 7 8 9 10-12+ Washable Coloured Hairspray for Birthday Children's Day Party Cosplay DIY(Blue)
10 Pcs Purple Hair Chalk for Kids Girls Gifts, MSDADA Temporary Bright Hair Chalk Comb for Kids Girls Age 6 7 8-12+ Washable Coloured Hairspray for Birthday Children's Day Halloween Christmas