Some kids have the talent and drive to make beautiful and useful items, but selling them is a problem because most online solutions are geared towards adults.
Build a marketplace for items handmade by kids. The platform should take into consideration the legal and mental situation of the kids selling: their age, parents’ involvement, particular logistical problems, etc.
You need or want a butler for a short period.
A marketplace for temporary (by the hour or day) butlers. On one side, anyone can offer your services as a butler at the times that are of convenience to you, and make some extra money. On the other side, anyone can request a butler for a short period anytime.
Help you find inspiration and ideas for your writings.
A library of writing snippets you can browse and search by keywords. Anyone who writes a small idea or thought can publish it in this library where others can find it and use it, rewrite it, and incorporate it into their own work. A licensing mechanism should also be specified including Creative Commons, free, paid licensing, etc.
Works of art can cost a lot. Tou still need and want art in your life, how can you get the pleasure without the prohibitive cost?
For artists and galleries, it’s a predictable income source, with the added option of gaining a repeat buyer.
Rent the work of art you like. Directly from the artist, gallery, or even a unique marketplace. If you fall in love with it and want to keep it, just buy it. Many purchasing options could be used, like deducting the money already paid for rent, having a fixed length leasing contract with a buyout option at the end, etc.