If he is like Z at this age inside toys or things just did not entertain him for long...
What he loved was nature, sticks, water, stones, cars, sand, duplo, blocks, pegs, playgrounds, balls, leaves, flowers holes, bouncing on the bed, making forts ... he is still very much the same.
Does L like to climb? Z never did till recently but some mums have success with inside obstacle courses
Shape sorting? Stacking? Ripping up paper? Ride on toys?