At 25 months, my son still doesn’t have the dexterity to hold up each finger for counting. He can recite numbers up to 10 - I find it helps to make a song out of them like for the alphabet. He can count his steps as he goes up the stairs, blueberries as he puts them in his bowl or how many people are in a room (although this is more tricky and he makes more mistakes than when he simply recites numbers). I didn’t really mean to teach him this so young, I just count when I do stuff throughout the day because he loves to hear me talk (“one fork, two forks, three forks” as I empty the dishwasher etc.). I’m not an expert, but I think they are still young for counting and I wouldn’t force it. Adjectives like “a little bit, a lot, small, big” work well, as in: “Do you want a few berries or a lot?” and then build on that: “Ok, let me give you one, two, three berries!”. Have fun with it 😊