There are many kinds of musical smart toys, the following are some common types:

1. Piano keyboard: By simulating the touch and sound of the piano keyboard, children can learn while playing music.

2. Electronic keyboard: similar to a real piano, but usually lighter and easier to carry. Some electronic keyboards also have recording and playback functions, making it easier for children to save and share their works.

3. Guitar/Ukulele: These instruments are generally more suitable for younger children than pianos because they are lighter and easier to play. Some guitars can also be connected to smartphones, allowing users to practice anytime and anywhere.

4. Drum instruments: including snare drum, drum set, etc. These instruments can help children develop a sense of rhythm and coordination.

5. Acoustic toys: such as African drums, tambourines, etc., can make different sounds, allowing children to feel the charm of music during play.

6. Music production software: Some software allows children to create their own music on the computer, such as GarageBand, FLStudio, etc.

7. Smart musical instruments: such as Tomtop Touch Smart Guitar, which can be connected to a smartphone or tablet via Bluetooth, allowing users to practice playing anytime and anywhere.

8. VR music experience: Through virtual reality technology, children can be immersed in the music world and gain an immersive experience.

9. AI music education robots: such as Jibo, etc., can teach children music knowledge and skills through interaction with them.

10. Music games: such as JustDance, RockBand, etc., allow children to learn and enjoy music in games.