How to reject someone politely

Hey mummies..I've been blessed some toys for my kids and I chatted abit with the blesser. After I received the items and thanked her, I thought we will end the conversation. However she says want to have playdate (my kids and hers are almost same age) however I've told her it's hard for me to go out as husband works weekend too that means I have to bring my 2 kids( 1 and 3yo) to meet? She doesn't stay near me either. I told her I can't really go out. Then as our kids almost same age she knows my boy birthday is this month and she ask me what my boy likes she wanna get him a birthday gift. I rejected as I'm not comfortable we only chatted for less than 1 hour? Then she proceeds to ask again says she is getting something and asks if I want to get too for my kids..then says she wanna buy these 2 toys for my kids..I rejected her again but she says treat as cny gift..i rejected her..today she msg me again says her girls got extra for Christmas presents and she wants to give my kids. I appreciate her kind thoughts but I'm really not comfortable with such generous gesture even though we only speak like less than an hour? How do I reject her politely and to stop bugging me? 😅 Kind of annoying. She also knows im going back to workforce this year after my younger one goes to cc and she says will help me to keep a lookout..appreciate it but i don't even know her? Understand she might just want to be friends but I feel weird? Can't keep thinking is she trying to sell me something in future or what? Help pls.