r/Duplo

I'm a huge Lego fan so have been excited to introduce my toddler to Duplo, we've bought a few sets and I've found that the main focus seems to be on figurines, objects, and special bricks and there's very few simple bricks, particularly 2x4 bricks.

I've looked through all the Duplo on the Lego website (UK), and even the assorted box doesn't have much in the way of standard blocks and has quite a lot of special blocks and figurines.

Whilst she loves imaginative play with the figures and cars and animals etc, I'd also like to be able to introduce her to building houses and towers and castles and whatever she can imagine, but we can't really do that with the bricks we have.

Is my only option to buy second hand and hope it's genuine Duplo and decent quality, or are there any current sets which have a higher number of the boring/standard bricks?

Thanks in advance!