Almost every activity in your day can be used as an opportuninty for learning.
Academic teaching of ABC's, 123's, seasons, nursery rhymes, weather, colours, shapes, animals, etc, etc can be taught directly, as you talk to your toddler or concretely through play.
Nature walks are a wonderful way to slow down and enjoy your toddler. I would walk around the block with them, with no agenda in mind. We would stop and examine the flowers, the bugs on the ground, the cars going past, the animals in the yards and just chat about each one.
Virtue teaching can be part of each activity too. Model manners at meal times, sing cheerfulness songs at bath time, talk about being a busy helper during chores time, role play kindness with dolls or trucks during play time and so on.
Being a toddler teacher is an all day, every day job with awesome, long-lasting rewards!!