The Rocket comes in two sizes for kids 33” to 45” in height (12” wheels) and for 39” to 50” (14” wheels).
Joystar offers this bike in a choice of five colors.
Depending on the color, this bike comes with a front basket or doll seat.
The footrests make it easy for kids to keep their feet off the floor when they learn to balance.
The airless EVA foam tires can’t go flat.
Parents appreciate the highly adjustable seatpost, providing plenty of room for their child to grow.
Buyers praise the easy assembly.
Customer support is very responsive, according to buyers.

6 reasons not to buy

Joystar confusingly states this bike’s weight capacity as 75lb and 110lb. One buyer says the seatpost bent with their 55lb child aboard.
Some parents say the tires are too hard and slick.
Buyers bemoan bent frames, warped wheels, and missing parts and accessories.
Several buyers complain that the replacement bikes they're sent are worse than the broken bikes being replaced.
Parents lament the “flimsy” plastic basket and doll seat and “cheap” wheel bearings.
Buyers say the seatpost clamp is too weak to stop the seatpost from sliding down.

Bottom line

Given how expensive raising children can be, parents can’t be blamed for hoping the Joystar Rocket is the budget-price balance bike they need. Alas, this is unlikely to be the case. There are no expert reviews, and customer feedback is filled with complaints about bikes that arrive broken or break soon after their children start riding them. There seem to be some happy buyers, but purchasing the Joystar Rocket appears to be a lottery that offers a low probability of joy for children or their parents. There are better options available at a range of price points.