First, a bit about utilizing developmental stages to help keep grandparents at bay:
our doctor believes that most children are overstimulated by having too many toys. he has suggested toys for each age and developmental stage, and we were able to use this to help facilitate the 'he doesn't need it' process with the grands.
luckily, it also fits in with our own philosphy too!
with this, i told the grands that if they gave us something that we didn't want or need, it would go directly to charity. this incentive not to spend was helpful.
Now, onto what my son likes.
when my son was that age (11 wks), his favorite toy was a box lid. seriously, i had a box from Trader Joes that was a nifty cube shape. one day, he got ahold of the lid, and it was his favorite toy until i finally got rid of it right around his first birthday.
his second favorite toy was his "jingle box." using a trader joes plastic candy box (for chocolate covered almonds), i simply put jingle bells into it (you could use beans, beads, whatever). he still loves this box.
this third favorite toy was a toilet paper roll. he still loves these. i have to replace them, but it's not hard to do!
before my son was born, i was very specific about what i wanted for him. i told both families (whose love languages are in objects; MIL hoards and gives you old stuff, my mother buys new) that we would tell them exactly what we wanted and needed as we needed it, and anything that we didn't want or need, would go directly to charity.
both have respected our wishes.
in lieu of toys, i asked for specific things: 1. clothing items as needed; 2. toys as i needed or desired them.
because of this, i haven't had to buy a lot of clothing for DS. my MIL doesn't do the clothing thing, so she doesn't give much, but my mother loves to buy baby clothes so she willingly does so. i give her a list of the size and what we need, and she'll buy it for me.
at birthday and christmas (we've had two christmas and one birthday so far), i asked each for a specific toy. i asked my parents to get blocks, my ILs to give him spinning tops (my FIL is a wood turner). my sister, sil, and great aunt bought him the instrument that we wanted for him (a drum). at christmas, it was a teddy bear, wooden train, and ukulele.
i haven't purchased much for him, honestly. since everyone else wants to, and i don't need much else, that's what we do. for christmas, we bought DS's ukulele tuner and case.