It will cause patent infringement. Someone has already applied for a patent for the fidget spinner.
[Appearance] Fidget spinner - 201730094458.2 Authorized
Applicant: Peng Shipi - Application date: 2017-03-27 - Main classification number: 21-01(11)
p>Abstract:1. The name of this design product: Fidget Spinner. 2. Purpose of this design product: This design product is used for children's entertainment and play. 3． The design points of this design product are: the overall shape of the product. 4. Pictures or photos that best illustrate the key points of this design: front view.