Spin the Gears, Spark the Mind.
What is about Secrets of this Toddler Toys?

Create a blooming world of motion with this 4-in-1 Gear + Blocks + Train + Music toy set for toddler toys 3-4,toys for kids ages 4-8.
Stem toys with 19 colorful gears and 19 connectors, toddler can build eye-catching layouts using the included guide—or invent their own designs as they discover how gears transfer movement.This toddler learning toys are perfect for toddler girl toys, toddler boy toys, toys for 3 year old boys, and toys for 3 year old girl.
After assembly, choose how to power the fun of this baby toys: turn the manual crank for instant spinning, or use electric mode, which links to the train's main power switch so the gear system rotates automatically. (Tool free for assembly.)
The train toys add extra excitement with a chimney featuring colorful light effects (light mode is not switchable) and easy, kid-friendly buttons: main power, music switch (3 songs), volume control, and forward. For simple operation, the toy train moves forward only (no reverse or steering control).
Made of durable ABS and includes 3 AA batteries, this kids toys is a fun gifts for toddler little builders who love construction play, moving parts, music, and lights. Suitable as birthday gifts, Easter gifts, Halloween gifts, Christmas gifts and other holiday gifts.
Each part of the gear building blocks undergoes multiple inspections and disinfection processes during manufacturing and before leaving the factory, ensuring product safety and Toddler-friendliness at all times.

WARNING: CHOKING HAZARD—Small parts.
When used as a toys for 1 year old, toddler toys 1-2, and toddler toys 2-3, parental supervision is required. Suggesting not for children under 3 years.