PET Bottle Baby DIY Toys

Generate four concept sheet images of handmade DIY toys for babies using the theme "{argument name="theme" default="PET bottle"}".

Important:
Please generate four images as separate images.
Please draw only one toy idea per sheet.
Do not include multiple ideas on one sheet.
Grids, collages, 2×2 divisions, and comparison table layouts are prohibited.

This is not a commercial baby toy design.
This is a DIY toy that parents can actually make by hand using existing materials at home.
Do not use finished products, mass-produced products, specialized parts, silicone molding, special molds, or high-end toys with product design styles that individuals cannot make by themselves.

If the theme is "PET bottles":
Instead of new products that look like plastic bottles, make them DIY toys that use actual empty PET bottles as they are.
Make sure you can see the original PET bottle shape, the transparent bottle body, the existing cap, the feeling of peeling off the label, and the hand-wrapped vinyl tape or masking tape.
Create an atmosphere where you can make it using only ingredients available at 100-yen shops or at home.

Each of the four pieces is a DIY toy with a different way of playing.
Photo 1: DIY toys to enjoy sound
Photo 2: DIY toy that you roll and chase
Photo 3: DIY toys for viewing and observing
Photo 4: DIY toys to enjoy, touch, grip, and feel the touch

Please include the following in each concept sheet.
・Main visual of the completed DIY toy
・Scenes where babies play with their hands
・List of ingredients to be used
・Simple 3-step illustration of how to make it
・Diagrams showing materials and structure
・Safety diagrams for cap fixing, sealing, water leak prevention, and damage checks
・Instructions icon
・Points that promote development

Safety Conditions:
The target age range is 6 months to 18 months.
Be sure to present it as a DIY toy to play with under the supervision of a guardian.
If you use small materials, always seal them completely inside the bottle or bag.
Do not attach small items that are easy to peel off on the outside.
Attach the cap and openings and secure them firmly with tape from above.
Small items that are accidentally ingested, sharp parts, fragile materials, and long strings are prohibited.
Scenes where the baby puts it in their mouth, bites, or licks are prohibited.

ビジュアルスタイル：
White background.
Gentle natural light.
Handmade toy recipes for nurseries and homes.
Looks like a DIY craft instruction sheet.
It looks realistic and easy to imitate.
The finish has a slightly handmade feel.
Materials should be accessible and inexpensive.
Don't make it look like a luxury baby product brand.
It doesn't look like a product rendering.
Cute, clean, and welcoming.
Text is minimal, focusing mainly on diagrams and icons.

Negative Rating:
commercial baby toy, premium product design, luxury product rendering, silicone molded toy, custom molded parts, factory-made toy, overmolded rubber, special cap, one-piece molded design, BPA-free product label, food-grade silicone label, industrial design board, polished manufactured product, baby chewing toy, baby biting toy, grid layout, collage layout, 2x2 layout, multiple ideas in one image