Play a C-major scale
Find C, then play the white keys in order up to the next C. Listen to the sound of each step. Come back down slowly and keep the notes even.
Build a chord
Play C, E, and G together. Those three notes make a C-major chord. Try F, A, and C next, then G, B, and D. Listen to how each chord has its own sound.
Find them in a piece
Look for groups of notes that sound like the chords you just played. Recognizing familiar patterns can make a new piece easier to read and remember.