Rainbow is an online fantasy-products store offering playful, giftable items and everyday accessories through its website. Its catalog spans stationery, entertainment products, bags and backpacks, mobile accessories, other novelty goods, and gift boxes. Stationery selections include notebooks, binders, pencil cases, pens, markers, erasers, sharpeners, stickers, and related supplies. Shoppers can also find creative activities such as coloring books, paint-by-number canvases, diamond-painting kits, and craft packs. Novelty offerings include musical jewelry boxes, music boxes, decorative keychains, and themed accessories.

The store features newly added products, popular items, and discounted selections, with product prices shown in Iranian toman. Customers can browse categories, add available items to a shopping cart, and use account features to manage orders, addresses, and wish lists. Rainbow also provides online guidance about placing orders, delivery, payment methods, returns, privacy, and terms of use. For customer contact, the site lists email support and links for Telegram, Instagram, and WhatsApp, as well as a telephone contact option.