I feed my birds once a day in the morning. They get their water dish rinsed out & cleaned before I put fresh water in each day. The fruit like apples gets put in the morning & taken out the end of the day. They also will need a cuttle bone to attach to the side of the cage. That is a form of calcium. Do not feed the cockatiels sand or grit it will pack their crops. Some books may say that but they can end up with an impacted crop.

The cage came from the pet store. It is a cage made for cockatiels. The bars in the cage vary in size these are approximately a half inch. The cage measures 24x17x17 1/2 inches. The cage has a white coating on the bars.
Make sure the bars of the cage are not lead. Lead will kill the birds it is very toxic for them. The birds use their beaks to move around the bars so can end up with lead poisoning that way. They also like to use their beaks to play with toys. Make sure the toys do not have lead in them or lead paint on the toys.

There are larger cages too. It depends on how many birds you put in the cage. I had only one cockatiel in the cage for the size I just mentioned.

You just never know if these birds will talk. My hen whistled & I learned her whistle & would whistle back. I called it our flock call. She would whistle when she heard me come home & greet me. I just loved her so much & still miss her terribly. These birds are so sweet & they just tug at your heart strings.

I will warn you though. It took a year & a half before my hen trusted me. She was a rescue & had been abused. If you buy young hand fed birds it will be an easier transition. You have to win their trust with lots of patience.

They can also bite & grab your finger or hand if they become irritated in some way, where they don't want to be handled. They can learn a step up onto your index finger. I would put my index finger down by my hens feet & ask her to step up.

A well check by your veterinary would be good also. If you can find a book about cockatiels at your local library or the pet store should have one to purchase it would be a good idea.