When you're looking to make your music more interesting, there are some fun and easy tricks you can try. Here are a few ideas to help you change up your melodies:

1. Change the Rhythm: You can keep the same notes but change how you play them. For example, if you originally play steady beats, try mixing in faster notes for a surprise.

2. Change Keys: This means you can move your melody to a different musical key. So, if your melody is in C major, try moving it to D major or A minor. This gives a fresh feel to your music.

3. Change the Intervals: This is about changing the distance between notes. If the first part of your melody goes up a third, you can switch it to go down a sixth instead. This can create cool new sounds.

4. Add Decorations: You can make your melody fancier by adding small notes or fun sounds, like trills or slides. For example, instead of just playing from C to E, try adding quick notes in between.

5. Repeat with Changes: Play a part of your song again, but change one or two notes, or add a new tune underneath it. This helps make it richer.

By using these techniques, you can give your melodies new life and make them shine!