Usually, bonsai trees are placed outside.It is Usually, bonsai trees are placed outside.It is also possible to enjoy bonsai trees inside, but please put your tree outside for 2 or 3 hours in outside so that tree can absorve the sunlight.
If you woulld like to have bonsai trees for interior, you should buy 3 or 4 and rotate them every 3 days. Please DO NOT put your tree under the direct sunlight.
If it is not possible, buy the 50% shading net.(you can get them from do-it-yourself shop). Place your tree on the wooden boad.
DO NOT put them on the trays, in order to protect the tree from root spoilings. And it is important to place your tree highter place to avoid pests.