Spidey & Octonauts Birthday Invite

I need a creative birthday invitation for kids featuring a Spidey and Octonauts theme. The invitation should be printable in A5 size (PDF or JPEG format).

Requirements:
- Engaging design incorporating Spidey and Octonauts elements
- A5 size, printable as PDF or JPEG

Ideal Skills:
- Graphic design experience
- Proficiency in creating printable invitations
- Familiarity with children's themes and preferences

Looking for a fun and colorful design to excite the kids!