Bonsai tree

From email:

I have been growing this bonsai tree for 5 months and all it has is small leaves. Not even real branches just branches that look like stems. What the leaves are growing on is just one thin stem.
Right now it is winter and I don’t know whether to put it away in a warm place, but there won’t be any sunlight or just keep it near the window with the window closed.
Is something wrong with my bonsai?


Answer:
How To Take Proper Care of Your Bonsai Tree...
During the Winter months – once nightly lows begin aproaching the 40 degree mark, it is time to bring your indoor bonsai inside. Do not change the location of your tree suddenly, the move should be done gradually over a period of several weeks. Bring it in for a few hours the first time, slowly increasing the time it spends indoors until it becomes aclimated to its new environment. The ideal indoor location is on a window sill facing south. A northern exposure will work, but it's necessary the use grow lights to provide sufficient light to keep your bonsai healthy. Four to six hours of sunlight per day should be enough to keep your bonsai tree healthy and happy
Watering Your Bonsai Tree – Watering of your bonsai must never be neglected. Apply water when the soil appears dry — never allow the soil to become completely dry. If your bonsai is receiving full sun, it may be necessary to water at least once a day. This schedule may vary with the pot size, type of soil and type of bonsai tree you own. Evaluate each tree’s water requirements and adjust your watering schedule to accomodate it. It is a good idea to use a moisture meter until you get to know the requirements of your bonsai tree. Watering should be done with a watering can or hose attachment which should dispense the water in a soft enough manner as not to disturb the soil. Water should be applied until it begins running out of the holes in the bottom of your pot.