Boom 3i

Buy him an Earfun UBOOM X for dorm parties. For his outdoor activities, add the Soundcore Boom 3i. Both speakers should fit within your budget, and they will give your grandson so much more than a Flip or UE Boom would.

I like the Charge 6. Flex 2 is also a great option but for your needs the JBL is more appropriate.  For something fun that doesn't get mentioned a lot, the Boom 3i is really good 

Mine should be waiting fir me at home once im done with work.. guessin this thing will smoke the flip 7 for sound quality but i will return here after some testing today

Have had ut crankin since 10 am this mornin while workin waitin to see how battery holds up have had it about 60 to 80 percent volume and tuned brightly in app rught now showin about 60 percent battery but soundwise it easily wipes the floor with the jbl flip 7 , the wking d320 doesnt come close to it as far as bass and clarity even with that having 2 tweeters but so far im super impressed with it. For 98 bucjw ya cant go wrong. Headin to lake after work will test the floating on it altho its not how id ever use it lol

As someone who's owned a shit ton of speakers since 2018 id go wuth something from wking or tronsmart..... my at home speakers are set of jbl partybox 110s ive had em since their release but ive sold the jbl boombox 3 wifi ive returned the jbl charge 6 and flip 7 ive returned the sony ult 5 ive returned the bose max why cuz of wking and tronsmart .... the wking d320 smokes the flip 7 in every way besides deep bass bit the kicker is thats only if ya play the flip 7 at 60 percent or less volume .. anything over that and sound goes to shit which is why I returned it and same goes for the charge 6 plus both their battery life is way overrated if ya add any bass and treble and play em at 60 percent or more volume the battery life is easily cut in half plus ya can't make or take calls with them..... but also the wking x20 is still for price of it and sound and features its literally unbeatable still today and that speaker is why I sold the jbl boombox 3 wifi I think only jbl speaker that is worth its pricetag is the speakers in their partybox lineup those speakers are bad fn ass but also tronsmart man have they ever impressed me since I got my first speaker from them.. the tronsmart mirtune h1... right away bought a 2nd for tws... thats why I returned the soundcore select 4 go the bose micro 2 and the jbl clip 5....but I now also own two of their trip 2 speakers and the fiitune x30 but for a shop id easily buy their bang 2 speaker..... sorry for long rant but I will never buy bamebrand speaker again after now owning multiple speakers from wking and tronsmart ..... both are becoming what soundcore used to be before they focused on marketing over sound but theyre producing speakers that cost consumers a lot less and sound as good or better along with having phenomenal accompanying apps to fine tune then with eq and update them. Soundcore got lazy and focuses too much on gimmicky shit and marketing ... their almost 10 yrs old motion + still smokes everything they've released since then for sound quality especially their 300 and boom 3i.... back then they focused on actual sounf but def arent doin so anymore so if I was you for smaller speakers id go with the mirtune h1 or the trip 2 or d320 or lil bigger and id go wuth the bang 2 or wking x20

try the soundcore boom 3i

Y, I have it too, that and the waterproofness, that are the only good things about it, while the bass will fail, if you play certain deeper basses. Try to play "Justin Zahn live at Berghain Snax Party" from YouTube on your Boom 3i, and you will soon feel the frontiers of your 3i. Bass gets really dirty, but again only certain types of bass, like some techno songs, especially music from Berlin 😉

Soundcore boom 3i, consider this option 

Yes, I also like the design. It's so playful, so fun. I like it 🔥

JBL Charge 6, JBL Flip 7, Soundcore Motion Plus, Soundcore Boom 3i. Overall, Motion Plus has the best sound. However, the bass may be lacking. 

Oh, it was just a note, no big deal. Try looking at soundcore boom 2, soundcore boom 3i

This is literally the best option for its price and size. If you need something a little smaller, I recommend the Soundcore Boom 3i.

Soundcore Boom Go 3i, you can adjust the full eq, it has Bass at low volume and it can be bright for voices, beats my tribit micro 2 in my opinion