docs: add EXPLAIN_LIKE_IM_FIVE.md for new contributors

EXPLAIN_LIKE_IM_FIVE.md

@@ -0,0 +1,34 @@
+# EXPLAIN LIKE I'M FIVE
+
+## What problem does this repo solve?
+
+Want to pay someone continuously over time? Like a salary by the second? **StellarStream** lets you stream Stellar payments — money flows from sender to recipient in real time, and the recipient can claim only what they've earned so far.
+
+## How does it work in 3 bullet points?
+
+1. **A sender creates a stream** — they deposit a total amount of Stellar and set a duration (e.g. "1,000 XLM over 30 days"). The money goes into a smart contract vault.
+2. **Value vests continuously** — every second, a tiny fraction unlocks for the recipient. After 15 days of a 30-day stream, exactly half is claimable.
+3. **Claim anytime, cancel anytime** — the recipient can claim their vested balance. The sender can cancel early; unvested funds go back. No lump-sum surprises.
+
+```
+    Stream timeline (30-day, 1000 XLM)
+
+    Deposit ─────────────────────────────────► Deadline
+       │                                        │
+       │    ▒▒░░░░░░░░░░░░░░░░░░░░░░░░░░░░     │
+       │    ^ 250 vested   ^ 500 vested         │
+       │     (day 7)       (day 15)             │
+       │                                        │
+       ▼                                        ▼
+    ┌──────┐                             ┌──────────┐
+    │Sender│                             │Recipient │
+    │  💰  │ ────── stream ────────────▶ │   💰     │
+    └──────┘                             └──────────┘
+```
+
+## Who should use this?
+
+- **Freelancers & contractors** who want to be paid by the hour/day instead of waiting for invoices
+- **Employers & DAOs** that want to stream salaries on-chain in real time
+- **Developers** learning Soroban vesting and time-based smart contract patterns
+- **Anyone exploring Stellar** payment streaming as an alternative to traditional payroll