I have a 1 year and half, 6 years, 12 years and 24 years gap with all of my siblings, all younger than me.
DB 1 and I are NOT close at all, we were very close as tiny kid and then distanced as DB2 came about and then completely hated each other as we entered our teens and are completely no contact nowadays.
I was 6 when DB2 came about and I have very sweet memories of him as a baby, and he is a lot like me in terms of personality and so while we didn’t spend that much time playing and interacting we are actually quite close and now we are both adult, still love each other to bits and I do try to maintain a close relationship with him and have stuff we do together.
I was 12 when DB3 was born, and I have lots of memories with him as a little kid but I moved out at 16 so when he was only 4 and I have been living abroad ever since. He is 14 now almost and so as a results I unfortunately don’t really have day to day memories with him as a kid but we are so incredibly close. I come back regularly enough to my home country so we can spend time together or I fly him out where I am and when we spend time together I really make sure to make the most of him and spoil him a bit as a result.
I was 24 when my Dsis was born and it’s a bit strange because I live abroad and so only met her when she was 1, she is a very cute toddler but since I have a distanced relationship with my mom I don’t really dare to get too close to the little one. It’s also strange to project myself into having a sibling relationship with someone who could be my daughter and will be 25 when I am 50. She for now is cute and while I don’t think we will be close and it’s a bit late to have the sister relationship I wanted growing up, I am still curious as to what relationship we will have if any.
Ultimately as an adult I am the closet to my siblings with whom I have a 6 and 12 years gap and absolutely cannot stand the sibling I only have a year difference with, so age gap means very little. It’s likely that your kids won’t play much together as kids BUT they might have an incredible bond come adulthood. I wouldn’t want my siblings to be any other age gap (bare my sister as I do think I won’t enjoy seeing my sister being a young version of me and the definition of “youth” as I turn grey myself!
) we ultimately have the special relationship we have because of the age gap we have.