Bestbuy offers Hover-1 - Raptor Hoverboard Buggy Attachment with LED Fog Blasters and Sound Effects - Black for $89.99 (orig. $119.99) with free shipping.

Product Description:
Hover-1 Raptor Hoverboard Buggy Attachment. The purchaser and rider of this product are responsible for knowing and obeying all state and local regulations regarding the use of this product. It is highly encouraged that you read and follow the product instructions including all safety precautions and use protective gear. 

• Ride Securely
  The two handles on the Hover-1 Raptor give you complete control of your hoverboard
• Ride Free
  Independent rear wheel control means sharp turns and reversing is easy
• Ride Fun
  Bright LEDs, fog blasters, and sound effects makes riding the Raptor feel like riding a rocket
• Ride Smooth
  Double shocks make the Raptor comfortable and safe
• Ride Anything
  Adjustable straps and adjustable frame length means the Raptor fits most Hoverboards with wheel sizes 6" - 10"