lot of questions

question the first-you know the gyroids u dig up can u switch them with the gyroid at the door?if not what are they for?

question the second-i resintly looked at my map and found a brand new bridge was made. how did it get there?

question the third- the pitfalls how do u use them? and what are they for?

question the fourth-in the museum what happens if u get all the stuff for it?

question the fifth-how do u get the turnips?

question the sixth-one day i checked the turnip prices and it was 114 bells the next day it was 1140 bells and he day after that it was 115 bells does it always increase like that and then drop?

if u have an awnser just put the num. of the question plz.

For question #1 That MrSpongeT9 didn't know the answer to... the answer is no, you can't switch the gyroid in front of your house with anything else. All of the other questions were already answered correctly.

Not that I know of. But you can get both at Redd's booth on New Years or I think 4th of July...
Also, you can get ballons from Tom Nook on random Sale events throughout the month.

If you want the pinwheel check the Universal Code thread page 4 i think and it should have the codes there.