The Bible doesn't say, it just says when he grew up, inferring that he was weaned:
Exodus 2:9,10- "Phar′aoh's daughter then said to her: "Take this child with you and nurse him for me, and I myself shall give you your wages." Accordingly the woman took the child and nursed him. And the child grew up. Then she brought him to Phar′aoh's daughter, so that he became a son to her; and she proceeded to call his name Moses and to say: "It is because I have drawn him out of the water."
Moses was in his mother's house for the purpose of being nursed (Exodus ch.2). The Talmud teaches that in those days babies were nursed from two to four years.
It isn't precisely known, but it would have been when he was weaned - somewhere around two years of age.
He was a baby , as the pharaohs daughter found him in a basket in the river.
He was at the age of weaning, which for the ancient Israelites was not later than his fourth birthday (and not earlier than his second birthday).
12 years old
around 70
The maiden was Pharaohs daughter, she became his foster mother.
Moses was rescued by the pharaoh's daughter when he was placed in the Nile River in a basket as a baby. She found him and raised him as her own.
Pharaoh's daughter found Moses. She raised him, but his own mother continued to nurse him when an infant.
Moses was discovered by the Pharaohs daughter, in the river, and gave the name Moses, which means taken out of the river.
Moses was of Hebrew parents, but he was hidden in the river Nile, and the Pharaohs daughter found him and adopted him.
Moses means drawn out, this name was given to Moses, by the pharaohs daughter.
The baby Moses was rescued by the Pharaohs daughter, as she came for a bath in the river, Moses means taken from the river.
The Pharaoh's daughter Thermuthis (Bithiah), who discovered him while she was bathing. He was then adopted into the Royal Family.
In the Bible, it was the Pharaoh's daughter who raised Moses.
Original name of Moses is Moshe, but when Pharaohs daughter took him from the water , she gave the name Moses, meaning taken from the water.
Bithiah
As moses was taken from the river by the Pharaohs daughter to the palace, Aaron did not go there. He stayed with his family and sister Miriam.